California to Texas: how much you actually save

§ II · Income Tax

The first delta: California's nation-high marginal brackets

California has the highest top marginal state income tax in the country. The brackets stack quickly. A single filer paying tax in California crosses into the 9.3 percent bracket at $66,295 of taxable income for the 2025 tax year, the 10.3 percent bracket at $341,189, the 11.3 percent bracket at $409,421, and the 12.3 percent bracket at $682,373. There is also a 1 percent mental health surcharge on income above $1 million, taking the true top rate to 13.3 percent. The Franchise Tax Board publishes the brackets annually; current numbers are at ftb.ca.gov.

Texas has no state income tax. The Texas Constitution (Article VIII, Section 24) requires a statewide referendum approved by a two-thirds majority of voters before any personal income tax could be enacted. The prohibition was strengthened by Proposition 4 in 2019, which now requires a constitutional amendment to introduce one. As a practical matter, the income tax line on a Texas resident's federal return that asks for state tax paid reads zero.

The income tax saving compounds quickly across the brackets. A married couple filing jointly with taxable income of $300,000 owes California approximately $20,400 in state income tax. Across to Texas, that is zero, immediately. For households with stock-based compensation that sees occasional large vesting events, the savings can dwarf every other line item in the move analysis. Two RSU vests of $200,000 each in a single year would face roughly $40,000 of California tax that evaporates the day Texas residency is established.

Estimates use 2025 single-filer brackets and standard deduction. Married joint filers face roughly half the marginal rate at the same income because brackets are doubled. Numbers rounded.

§ IV · The Smaller Lines

Sales tax, vehicle, gas, insurance: the smaller lines

Sales tax is roughly a wash. California's combined state-and-local sales tax averages 8.85 percent (state 7.25 percent plus local up to 2.5 percent). Texas's combined average is 8.20 percent (state 6.25 percent plus local up to 2 percent). On $40,000 of taxable household spending per year, the difference is around $260 in Texas's favour. Both states exempt unprepared groceries, so for households with substantial grocery spending the effective sales tax base is smaller than headline household spending implies.

Vehicle registration is the most underreported delta. California uses a value-based registration fee that includes the vehicle license fee at 0.65 percent of the depreciated vehicle value, plus weight fees, plus a fixed registration fee. A $40,000 car in its second year costs roughly $400 to $450 to register. Texas charges a flat $50.75 base registration plus county fees, typically $80 to $150 total, regardless of vehicle value. For a household with two newer vehicles, Texas saves around $400 to $700 per year in registration alone.

Gasoline tax goes the other way, but only modestly. California's state gas tax is the highest in the country at 60.6 cents per gallon (2025). Texas charges 20 cents per gallon. The California Air Resources Board cap-and-trade adds another 23 to 30 cents per gallon at the pump. A household driving 24,000 miles per year in vehicles averaging 25 mpg uses roughly 960 gallons, so the California gas-tax premium runs about $400 to $450 per year. The Texas saving is similarly $400 to $450 per year.

Auto insurance is materially cheaper in Texas. The 2024 average annual premium for full coverage in Texas is approximately $2,140; California is approximately $2,420 (Insurance Information Institute). Homeowners insurance favours Texas inland and California coastal, depending on wildfire and hurricane exposure. A standard inland-Texas home with no flood-zone exposure runs $1,800 to $2,800; a comparable California coastal-foothills property runs $2,500 to $4,500 plus separate California Earthquake Authority coverage. Insurance can swing the total math by $1,000 to $3,000 per year either way depending on exact location and risk profile.

§ VI · Exit Tax Myths

California exit tax: what is real, what is rumour

There is no California exit tax in 2026. AB 259, introduced in 2023, would have imposed a 1.5 percent annual wealth tax on net worth above $1 billion (or $50 million for couples), plus a continued tax obligation for up to 10 years after leaving the state. It did not pass. Earlier versions in 2020 (AB 2088) and 2022 (AB 1253) also failed. Bills are reintroduced periodically but as of May 2026 none have become law.

What does exist is California's aggressive residency audit. The Franchise Tax Board uses an 11-factor test (FTB Publication 1031) to determine whether a person who moved out is genuinely a non-resident or is still a California resident for tax purposes. Factors include: location of primary residence, location of family, location of vehicles, location of bank accounts, location of professional service providers (doctor, lawyer, accountant), voter registration, driver's licence state, where the person spends most of their time, where business interests are managed, location of social and club memberships, and location of religious institutions or other community ties. A clear-cut audit-resistant move severs as many of these as possible.

For employees with deferred compensation or stock options earned in California, California claims taxing rights on the income earned during the period of California residency, even if it is paid out after the move. RSUs that vested while you were a Californian remain California-source. RSUs that vest after your residency change date are Texas-source. Timing the move relative to vest schedules matters. The same applies to bonus payments tied to California work periods. This is not an exit tax; it is normal source-based income taxation.

The cleanest move sells the California home, buys a Texas home, moves the family, changes driver's licences and voter registration on day one, severs California professional relationships, and stays out of California for at least 184 days in the move year (so the bulk of days are in Texas). FTB's audit pattern is to look hardest at moves followed quickly by very large stock sales, where the appearance of a tax-driven move is strongest. A move with a normal employment continuation in Texas, no immediate large gains, and clean documentation of new domicile rarely faces audit.

§ VIII · Queries

Frequently asked